For my students in 10th std.

1. Articles:  Definite and Indefinite: 
2. Indefinite: a, an
3. I saw a boy. which boy? Was he stout or lean? Do you know the answer.So article A is indefinite.
4. I saw an elephant on the road. 
5. What color was the elephant?
6.  Was it a male elephant or a female elephant?
7. Was it  a big elephant? No, you do not know.
8. Because there is nothing specific about the boy or the elephant.
9. So articles"a"  and" an" are indefinite articles.
10. And article an is used when the nouns are starting with the vowels a,e,i.o.u and silent or mute h.
11. Examples : an apple, and egg, an ice-cream, an orange and an umbrella.  an hour, an hotel.
12. I ate an apple. I broke an egg. I ate an ice- cream. I peeled an orange. I took an umbrella. I waited for an hour for him.
13. Definite:  the word "THE" tells about the specific thing.
14. The boy was wearing a red shirt. The boy was tall and lean.
15. The elephant has two big,long tusks.
16. It swings its trunk this side and that side.
17. The tells about the boy who was wearing a red shirt and who was tall and lean.
18. The here tells about the particular elephant which had two big,long tusks and about its swinging the trunk this side and that side.
19. So "article" "THE" talks about the definite  and specific thing.
20. So  it is  called the definite article.
21. OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOPrepositions:
22. What are prepositions?
23. preposition (ˌprɛpəˈzɪʃən)
    n

    1. (Grammar) a word or group of words used before a noun or pronoun to relate it grammatically or semantically tosome other constituent of a sentence. Abbreviation: prep
    [C14: from Latin praepositiō a putting before, from pōnere to place]
24. http://www.thefreedictionary.com/prepositions 
25. http://www.thefreedictionary.com/prepositions
26. by: This is written by me. This world is created by God.(BY)
27. At: Don't go alone in the dark lane at night.
28. From: This train goes to Chennai and coming from Coimbatore.
29. Below:The earth is below.
30. Amidst: The house was amidst some dense.
31. In: You can come in now.
32. Out: Don't go out in the rain.
33. Till: Wait till I tell you.
34. up to: You can now read up to page 19.
35. After: The dog runs after the cat.If it catches it ,it will not know what to do.
36. Of: The world is full of good people. You can find them if you try.
37. On: We can go on and on  but start at least now.
38. For: This is specially made for you.
39. You can continue  on your journey of English.
40. Wish you good luck.
41. oooooooooooooooooooooooooooooooooooooooooo
42. Linkers and connectors:
43. Besides being small, that room is also very dark.(besides meaning in addition to)
44. Call me up in case you are denied the permission.(in case)
45. Though he is from India, he can speak very good French.(though)
46. Can you find a book that  tells about the weather in this particular region.(that)
47. This is the house that Jack built. (that)
48. Inform me as soon as you reach the station.(as soon as)
49. While you are here, listen to this melodious music.(While) 
50. We started late but we reached safely.(but)
51. If you concentrate you can do wonders.(If)
52. Since  it was raining heavily, the train was delayed.(sin